Versions older than 1.4.1.28 does NOT recognize IE11-EXE! If you use 1.4.29 WTK puts the IE11 and KB2898785 at the very bottom of the Updates-Tab in the section "Internet Explorer" Thiersee
Lol, more than 700 updates, that's insane ! also, your'e integrating IE9, IE10, and IE11, no wonder it doesn't works ! dareckibmw is right, follow his instructions and you will have a perfectly up-to-date (with the least bloat possible) Windows 7 image.